diff --git a/README.md b/README.md
index b5a44e2..715186c 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,16 @@
-# MacOS-SMB-FIx
+# MacOS SMB icon switcher
 
-A shell script to replace the obnoxious BSOD icon for SMB shares that has been present in MacOS for years.
\ No newline at end of file
+A shell script to replace the obnoxious BSOD icon for SMB shares that has been present in MacOS for years.
+
+# Notes
+  * This script uses the generic PC or monitor icon from the OS as the default icon for SMB (Windows) shares.
+## MacOS 10.15 Catalina and newer
+You'll need to disable filesystem protection *and* System Integrity Protection. Boot into recovery (Cmd+R), launch the terminal from the **Utilities** menu, and enter the following:
+```bash
+csrutil enable --without fs
+csrutil disable
+```
+Boot back in to your regular OS, launch Terminal, and run the following to remount the system volume as read/write:
+```bash
+sudo mount -uw /
+```
\ No newline at end of file